Monitor arm



FIG. 1 is a top, right, front perspective view of a monitor arm showing our new design, the broken line drawings of the nut and washer and the screw and shank are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a right side elevational view thereof; the left side elevational view being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a front elevational view thereof.

The broken line drawing of a nut and washer in FIG. 3 and the screw and shank in FIGS. 2-6 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a monitor arm, as shown and described. 